Can Sombody answer this question? please thank you

Someone . me. compound probability

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.